JPS63130357A - Piezoelectric element driving circuit - Google Patents
Piezoelectric element driving circuitInfo
- Publication number
- JPS63130357A JPS63130357A JP61277947A JP27794786A JPS63130357A JP S63130357 A JPS63130357 A JP S63130357A JP 61277947 A JP61277947 A JP 61277947A JP 27794786 A JP27794786 A JP 27794786A JP S63130357 A JPS63130357 A JP S63130357A
- Authority
- JP
- Japan
- Prior art keywords
- piezoelectric element
- transistor
- turned
- coil
- circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000008929 regeneration Effects 0.000 claims description 3
- 238000011069 regeneration method Methods 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 abstract description 6
- 230000001172 regenerating effect Effects 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/22—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of impact or pressure on a printing material or impression-transfer material
- B41J2/23—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of impact or pressure on a printing material or impression-transfer material using print wires
- B41J2/30—Control circuits for actuators
Landscapes
- Impact Printers (AREA)
- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
- Particle Formation And Scattering Control In Inkjet Printers (AREA)
- Dot-Matrix Printers And Others (AREA)
Abstract
Description
本発明は電力効率を改善した圧電素子駆動回路に関する
。The present invention relates to a piezoelectric element drive circuit with improved power efficiency.
従来、ドツトマトリックス型のプリンタにおけるワイヤ
の駆動又はインクジェット型のプリンタにおけるインク
粒子発生機構の駆動に圧電素子を用いるこ七が提案され
ている。その圧［素子は例えば第４図に示す駆動回路に
より駆動される。即ち、圧電素子２はトランジスタ３を
介して直流型′源１に接続されており、圧電素子２はト
ランジスタ３が印字開始信号Ｓ１によって導通すること
により、直流電源１の電圧が印加される。電圧が印加さ
れると圧電素子２は伸長又は縮小し、その変位が伝達機
構により拡大されて印字機構、例えばワイヤが駆動され
る。ところが、圧電素子２はキャパシタを構成しており
、トランジスタ３がオフしても、電荷が充電されている
ため伸長又は縮小したままとなり、印字機構の変位は元
に戻らない。
このため、圧電素子２に並列にトランジスタ４を接続し
、印字動作の終了後に印字終了信号Ｓ２によりトランジ
スタ４を一定時間オンさせて、圧電素子２に蓄積された
電荷を放電させて印加電圧を零にし、印字機構の変位を
元に復帰させている。Conventionally, it has been proposed to use a piezoelectric element to drive a wire in a dot matrix printer or to drive an ink droplet generating mechanism in an inkjet printer. The pressure element is driven by a drive circuit shown in FIG. 4, for example. That is, the piezoelectric element 2 is connected to the DC power supply 1 via the transistor 3, and the voltage of the DC power supply 1 is applied to the piezoelectric element 2 when the transistor 3 is made conductive by the print start signal S1. When a voltage is applied, the piezoelectric element 2 expands or contracts, and the displacement is magnified by a transmission mechanism to drive a printing mechanism, such as a wire. However, the piezoelectric element 2 constitutes a capacitor, and even if the transistor 3 is turned off, the piezoelectric element 2 remains expanded or contracted because it is charged, and the displacement of the printing mechanism does not return to its original state. For this purpose, a transistor 4 is connected in parallel to the piezoelectric element 2, and after the end of the printing operation, the transistor 4 is turned on for a certain period of time by the printing end signal S2, thereby discharging the charge accumulated in the piezoelectric element 2 and reducing the applied voltage to zero. The displacement of the printing mechanism is returned to its original state.
ところが、圧電素子２に蓄積された電荷は放電時に抵抗
損として失われ、圧電素子２を再度駆動する場合には直
流電源１から再度充電している。
このため、印字機構の駆動に際し電力損失が大きくなり
、電力効率が良くないという問題があった。However, the charge accumulated in the piezoelectric element 2 is lost as resistance loss during discharge, and when the piezoelectric element 2 is driven again, it is charged again from the DC power source 1. For this reason, there is a problem in that power loss is large when driving the printing mechanism, and power efficiency is poor.
本発明は、上記の問題点を解決するために成されたもの
であり、その目的とするところは、駆動時に圧電素子に
充電される電荷を回生ずることにより、圧電素子の電力
効率を改善することである。The present invention has been made to solve the above problems, and its purpose is to improve the power efficiency of the piezoelectric element by regenerating the electric charge charged in the piezoelectric element during driving. That's true.
【問題点を解決するための手段】
上記問題点を解決するための発明の構成は、外部信号に
応答して直流電源により圧電素子を充電する充電回路を
有した圧電素子駆動回路において、圧電素子の端子間に
接続された、コイルと制御信号により導通するスイッチ
素子の直列接続から戊る放電回路と、コイルの両端子を
それぞれ直流電源から流出する方向の電流を阻止するダ
イオードを介して直流電源に接続して成る回生回路とを
設けたことである。[Means for Solving the Problems] The structure of the invention for solving the above problems is to provide a piezoelectric element drive circuit having a charging circuit that charges the piezoelectric element with a DC power supply in response to an external signal. A discharge circuit is connected between the terminals of the coil and a switch element connected in series with each other, and the switching element conducts depending on the control signal.The DC power supply is connected to both terminals of the coil through diodes that block current flowing from the DC power supply. This is because a regenerative circuit is connected to the regenerative circuit.
駆動時には圧電素子は充電回路により直流電源から充電
される。また、駆動後の圧電素子の放電時には、コイル
と制御信号により導通するスイッチ素子の直列接続から
成る放電回路を電流が流れ、圧電素子に蓄積されている
静電エネルギーはコイルに静磁エネルギーとして蓄えら
れる。圧電素子の端子間電圧がほぼ零となる時に、スイ
ッチ素子がオフされるとコイルの逆起電力によりダイオ
ードを介して直流電源の正極側に電流が流れ、コイルに
蓄積されたエネルギーが直流電源に回生される。このた
め、駆動時に圧電素子に蓄積される電荷は回生されるの
で、圧電素子駆動回路の電力効率が向上する。During operation, the piezoelectric element is charged from a DC power source by a charging circuit. Furthermore, when the piezoelectric element is discharged after being driven, a current flows through a discharge circuit consisting of a series connection of a coil and a switch element that is brought into conduction by a control signal, and the electrostatic energy accumulated in the piezoelectric element is stored in the coil as static magnetic energy. It will be done. When the switching element is turned off when the voltage between the terminals of the piezoelectric element is almost zero, current flows to the positive side of the DC power supply through the diode due to the back electromotive force of the coil, and the energy stored in the coil is transferred to the DC power supply. be regenerated. Therefore, the charge accumulated in the piezoelectric element during driving is regenerated, so that the power efficiency of the piezoelectric element drive circuit is improved.
以下、本発明を具体的な実施例に基づいて説明する。第
１図は本発明の具体的な一実施例にかかる圧電素子駆動
回路の回路図である。圧電素子２の両端子には充電回路
を構成するトランジスタ３と直流電源１の直列回路が接
続されている。また、圧電素子２の端子間にはコイル５
とスイッチ素子への直列接続から成る放電回路が接続さ
れている。
そのスイッチ素子Ａは、コイル５のａ端子を圧電素子２
の接地端子に接続するための主スィッチを構成するトラ
ンジスタ６と制御信号によりトランジスタ６をオンさせ
圧電素子２の端子電圧■１がほぼ０ボルトとなった時に
トランジスタ６をオフさせるためのトランジスタ７とト
ランジスタ８から成る。また、コイル５のａ端子はダイ
オード９を介して直流電源１の正極に接続され、コイル
５のｂ端子はダイオード１０を介して直流電源１の陰極
（接地）に接続されている。ダイオード９．１０の極性
は直流電源１の正極から電流が流失するのを阻止する方
向である。
各部の電圧波形と電流波形は第２図に示されている。ま
ず、時刻ｔ１でトランジスタ３０ベースに入力している
駆動開始信号■２が高レベルとなると、トランジスタ３
はターンオンし、圧電素子２は直流電源１から電圧が印
加され、その端子電圧■１は所定の電源電圧ＶＭとなり
圧電素子２は充電される。すると、圧電素子２は伸長又
は縮小し、充電により生じた変位が図、示しない伝達機
構により拡大されてワイヤが駆動され、対応するドツト
が印字される。
次にトランジスタ３０ベースに印加される駆動開始信号
■２は時刻ｔ２で低レベルとなり、トランジスタ３は時
刻ｔ２でターンオフするが、圧電素子２には電荷が蓄積
されており、その端子電圧■１は電源電圧ＶＭを保持し
、圧電素子２は変位したままとなる。
次に時刻ｔ３でトランジスタ７０ベースに駆動終了信号
■３が印加されると、トランジスタ７はオンしトランジ
スタ７のコレクタ電位はほぼ０ボルトとなる。すると、
トランジスタ８のベース、エミッタ間は順方向にバイア
スされるため、トランジスタ８はターンオンする。する
と、トランジスタロのベース、エミッタ間は順方向にバ
イアスされるため、トランジスタ６はターンオンする。
トランジスタ６がオンになると、コイル５のａ端子は接
地されるので、圧電素子２に蓄積された電荷はコイル５
とトランジスタ６を流れて放電される。
この時、コイル５を流れる電流Ｉは圧電素子２の端子電
圧■１に対しπ／２だけ位相が遅れる。即ち、圧電素子
２の端子電圧Ｖ１は、時刻ｔ３から時刻ｔ４にかけて徐
々に減少し時刻ｔ４で零となる。これに対し、コイル５
を流れる電流Ｉは、時刻ｔ４で最大値Ｉｍとなる。
放電により圧電素子２の端子電圧■１がほぼＯボルトと
なると、トランジスタ８のベース電流が流れなくなりト
ランジスタ８がターンオフする。
すると、トランジスタ６のベース電流もＯとなりトラン
ジスタ６もターンオフする。トランジスタ６がターンオ
フすると、コイル５に逆起電力が発生し、ダイオード９
、直流電源１、ダイオード１０と電流が流れ、コイル５
に蓄積されたエネルギーは直流電源１に回生される。直
流電源１に流れる電流Ｉ２は時刻ｔ４から１ｍで流れ出
し、時刻ｔ５で零となる。このように駆動時に圧電素子
２に充電された・電荷は直流電源１に回生され、圧電素
子２の端子電圧■１はほぼＯボルトとなり圧電素子２の
変位は元に戻る。
第３図はドツトマトリック型のプリンタの駆動回路であ
る。第３図の駆動回路では回路部Ｂが各ワイヤ毎の回路
Ｃ１〜Ｃｎで共通に使用されている。回路Ｃ１において
、圧電素子２１を選択的に充電するトランジスタ７１が
圧電素子２１と直流電源１との間に接続され、圧電素子
２１の正極とコイル５のｂ端子間に、陰極がｂ端子に接
続されたダイオード８１が設けられている。他の回路Ｃ
２〜Ｃｎの構成は回路ＣＩと同様である。
圧電素子の駆動時には、駆動する圧電素子例えば圧電素
子２１を有する回路Ｃ１のトランジスタ７１のベースに
駆動開始信号■２を入力すれば、その圧電素子２１が駆
動される。この時、回路ＣＩのダイオード８１と等価な
他の回路Ｃ２〜Ｃｎに設けられているダイオードは逆バ
イアスされるので、他の回路０２〜Ｃｎの圧電素子は充
電されない。従って、駆動開始信号■２を入力した回路
の圧電素子だけが選択的に充電される。
各圧電素子に充電されている電荷を回生ずる場合には、
駆動終了信号■３をトランジスタ７のベースに入力する
。すると、充電された全ての圧電素子からダイオード８
１等を介しコイル５とトランジスタ６に電流が流れる。
その後、コイル５のｂ端子の電位がほぼ０ボルトとなる
と、トランジスタ６がターンオフし、コイル５に発生す
る逆起電力により、ダイオード９と直流電源１とダイオ
ード１０とコイル５から成る回路を直流電源１の正極の
方向に電流が流れる。こうして、充電されている全ての
圧電素子の電荷は一斉に直流電源１に回生される。尚、
第１図と第３図に示したスイッチ素子Ａは例示であって
、導通と非導通を制御できれば他の構成でも構わない。The present invention will be described below based on specific examples. FIG. 1 is a circuit diagram of a piezoelectric element drive circuit according to a specific embodiment of the present invention. A series circuit of a transistor 3 and a DC power supply 1, which constitute a charging circuit, is connected to both terminals of the piezoelectric element 2. In addition, a coil 5 is connected between the terminals of the piezoelectric element 2.
A discharge circuit consisting of a series connection to the switch element and the switch element is connected. The switch element A connects the a terminal of the coil 5 to the piezoelectric element 2.
A transistor 6 constitutes a main switch for connecting to the ground terminal of the piezoelectric element 2, and a transistor 7 serves to turn on the transistor 6 by a control signal and turn off the transistor 6 when the terminal voltage 1 of the piezoelectric element 2 becomes approximately 0 volts. It consists of transistor 8. Further, the a terminal of the coil 5 is connected to the positive electrode of the DC power source 1 via a diode 9, and the b terminal of the coil 5 is connected to the negative electrode (ground) of the DC power source 1 via a diode 10. The polarity of the diodes 9 and 10 is such that it prevents current from flowing away from the positive pole of the DC power supply 1. The voltage waveform and current waveform of each part are shown in FIG. First, at time t1, when the drive start signal 2 inputted to the base of the transistor 30 becomes high level, the transistor 3
is turned on, a voltage is applied to the piezoelectric element 2 from the DC power supply 1, the terminal voltage 1 becomes a predetermined power supply voltage VM, and the piezoelectric element 2 is charged. Then, the piezoelectric element 2 expands or contracts, and the displacement caused by charging is magnified by a transmission mechanism (not shown) to drive the wire and print a corresponding dot. Next, the drive start signal ■2 applied to the base of the transistor 30 becomes a low level at time t2, and the transistor 3 is turned off at time t2, but the piezoelectric element 2 has charges accumulated, and its terminal voltage ■1 becomes The power supply voltage VM is maintained, and the piezoelectric element 2 remains displaced. Next, at time t3, when the drive end signal 3 is applied to the base of the transistor 70, the transistor 7 is turned on and the collector potential of the transistor 7 becomes approximately 0 volts. Then,
Since the base and emitter of the transistor 8 are biased in the forward direction, the transistor 8 is turned on. Then, since the base and emitter of the transistor 6 are biased in the forward direction, the transistor 6 is turned on. When the transistor 6 is turned on, the a terminal of the coil 5 is grounded, so the charge accumulated in the piezoelectric element 2 is transferred to the coil 5.
flows through transistor 6 and is discharged. At this time, the phase of the current I flowing through the coil 5 is delayed by π/2 with respect to the terminal voltage ■1 of the piezoelectric element 2. That is, the terminal voltage V1 of the piezoelectric element 2 gradually decreases from time t3 to time t4 and becomes zero at time t4. On the other hand, coil 5
The current I flowing through reaches the maximum value Im at time t4. When the terminal voltage 1 of the piezoelectric element 2 becomes approximately O volts due to discharge, the base current of the transistor 8 stops flowing and the transistor 8 is turned off. Then, the base current of the transistor 6 also becomes O, and the transistor 6 is also turned off. When the transistor 6 turns off, a back electromotive force is generated in the coil 5, and the diode 9
, the current flows through the DC power supply 1, the diode 10, and the coil 5
The energy stored in is regenerated to the DC power supply 1. The current I2 flowing through the DC power supply 1 starts flowing 1 m from time t4, and becomes zero at time t5. In this way, the charge charged in the piezoelectric element 2 during driving is regenerated to the DC power supply 1, and the terminal voltage 1 of the piezoelectric element 2 becomes approximately O volts, and the displacement of the piezoelectric element 2 returns to its original state. FIG. 3 shows a drive circuit for a dot matrix printer. In the drive circuit shown in FIG. 3, the circuit section B is commonly used by the circuits C1 to Cn for each wire. In the circuit C1, a transistor 71 that selectively charges the piezoelectric element 21 is connected between the piezoelectric element 21 and the DC power supply 1, and a cathode is connected between the positive electrode of the piezoelectric element 21 and the b terminal of the coil 5, and the negative electrode is connected to the b terminal. A diode 81 is provided. Other circuit C
The configuration of circuits 2 to Cn is the same as that of circuit CI. When driving a piezoelectric element, if a drive start signal (2) is input to the base of the transistor 71 of the circuit C1 having the piezoelectric element to be driven, such as the piezoelectric element 21, the piezoelectric element 21 is driven. At this time, the diodes provided in the other circuits C2 to Cn, which are equivalent to the diode 81 of the circuit CI, are reverse biased, so the piezoelectric elements of the other circuits 02 to Cn are not charged. Therefore, only the piezoelectric element of the circuit to which the drive start signal (2) is input is selectively charged. When regenerating the charge stored in each piezoelectric element,
The drive end signal 3 is input to the base of the transistor 7. Then, from all the charged piezoelectric elements, the diode 8
A current flows through the coil 5 and the transistor 6 through the coil 5 and the transistor 6. After that, when the potential of the b terminal of the coil 5 becomes approximately 0 volts, the transistor 6 is turned off, and the back electromotive force generated in the coil 5 converts the circuit consisting of the diode 9, the DC power supply 1, the diode 10, and the coil 5 into a DC power supply. Current flows in the direction of the positive electrode. In this way, the charges of all the charged piezoelectric elements are regenerated to the DC power supply 1 all at once. still,
The switch element A shown in FIGS. 1 and 3 is an example, and other configurations may be used as long as conduction and non-conduction can be controlled.
本発明は圧電素子の端子間に接続された、コイルと制御
信号により導通するスイッチ素子の直列接続から成る放
電回路と、コイルの両端子をそれぞれ直流電源から流出
する方向の電流を阻止するダイオードを介して直流ＴＬ
？ｆＡに接続して成る回生回路とを有しているので、駆
動時に圧電素子に充電された電荷はスイッチ素子を１回
オンオフするだけで電源に回生される。従って、回生時
のスイッチングロスを少なくして充電電荷を有効に回生
ずることができるため圧電素子駆動回路の電力効率が向
上する。The present invention includes a discharge circuit connected between the terminals of a piezoelectric element and consisting of a series connection of a coil and a switching element that conducts in response to a control signal, and a diode that blocks current flowing from a DC power source through both terminals of the coil. DC TL via
? Since the piezoelectric element has a regeneration circuit connected to fA, the charge charged in the piezoelectric element during driving is regenerated to the power supply by turning the switch element on and off once. Therefore, since the switching loss during regeneration can be reduced and the charged charges can be effectively regenerated, the power efficiency of the piezoelectric element drive circuit is improved.
第１図は本発明の具体的な一実施例にかかる圧電素子駆
動回路の回路図。第２図はその圧？ｌ！素子駆動回路の
動作を説明するためのタイミングチャート。第３図は他
の実施例にかかる圧電索子駆動回路の回路図。第４図は
従来の圧電素子駆動回路の回路図である。
１ 直流電源 ２ 圧電素子 ３，４，６．７゜８ 、
７１−）ランジスタ ５ コイル ９．１０゜８１ ダ
イオード Ｃ１〜Ｃｎ 回路第１図
第２図FIG. 1 is a circuit diagram of a piezoelectric element drive circuit according to a specific embodiment of the present invention. Is that pressure in figure 2? l! 5 is a timing chart for explaining the operation of the element drive circuit. FIG. 3 is a circuit diagram of a piezoelectric cable drive circuit according to another embodiment. FIG. 4 is a circuit diagram of a conventional piezoelectric element drive circuit. 1 DC power supply 2 Piezoelectric element 3, 4, 6.7°8,
71-) Transistor 5 Coil 9.10゜81 Diode C1~Cn Circuit Figure 1 Figure 2
Claims (2)
電する充電回路を有した圧電素子駆動回路において、 前記圧電素子の端子間に接続された、コイルと制御信号
により導通するスイッチ素子の直列接続から成る放電回
路と、 前記コイルの両端子をそれぞれ直流電源から流出する方
向の電流を阻止するダイオードを介して直流電源に接続
して成る回生回路と を有することを特徴とする圧電素子駆動回路。(1) In a piezoelectric element drive circuit having a charging circuit that charges a piezoelectric element with a DC power supply in response to an external signal, a switching element connected in series between a coil and a control signal is connected between the terminals of the piezoelectric element. A piezoelectric element drive circuit comprising: a discharge circuit comprising a connection; and a regeneration circuit comprising a discharge circuit connecting both terminals of the coil to a DC power supply via diodes that block current flowing from the DC power supply. .
前記圧電素子の端子間電圧が略０Ｖとなった時にオフす
る素子であることを特徴とする特許請求の範囲第１項記
載の圧電素子駆動回路。(2) After the switch element is made conductive by a control signal,
2. The piezoelectric element drive circuit according to claim 1, wherein the piezoelectric element drive circuit is an element that turns off when a voltage between terminals of the piezoelectric element becomes approximately 0V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61277947A JPH0720703B2 (en) | 1986-11-20 | 1986-11-20 | Piezoelectric element drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61277947A JPH0720703B2 (en) | 1986-11-20 | 1986-11-20 | Piezoelectric element drive circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63130357A true JPS63130357A (en) | 1988-06-02 |
| JPH0720703B2 JPH0720703B2 (en) | 1995-03-08 |
Family
ID=17590490
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61277947A Expired - Lifetime JPH0720703B2 (en) | 1986-11-20 | 1986-11-20 | Piezoelectric element drive circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0720703B2 (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0379780A2 (en) * | 1988-10-28 | 1990-08-01 | Brother Kogyo Kabushiki Kaisha | Driver circuit for piezoelectric actuator in a dot matrix printer |
| JPH02210884A (en) * | 1989-02-10 | 1990-08-22 | Juki Corp | Piezoelectric element driving device |
| DE4122984A1 (en) * | 1990-07-11 | 1992-01-16 | Brother Ind Ltd | Control unit for piezoelectrical element - is connected to current supply unit and coil with switching unit selectively switched on and off to form resonant circuit |
| JPH0471858A (en) * | 1990-07-11 | 1992-03-06 | Brother Ind Ltd | Driving device of piezoelectric element |
| US5147141A (en) * | 1988-10-28 | 1992-09-15 | Brother Kogyo Kabushiki Kaisha | Driver circuit for piezoelectric actuator, and dot-matrix head and printer using piezoelectric or other actuator having discharge control means |
| WO2011024460A1 (en) * | 2009-08-27 | 2011-03-03 | 京セラ株式会社 | Input device |
| WO2011024459A1 (en) * | 2009-08-27 | 2011-03-03 | 京セラ株式会社 | Input device and method for controlling input device |
| JP2011048854A (en) * | 2010-11-04 | 2011-03-10 | Kyocera Corp | Input device |
| JP2011048855A (en) * | 2010-11-04 | 2011-03-10 | Kyocera Corp | Input apparatus and control method of input apparatus |
| GB2596869A (en) * | 2020-07-10 | 2022-01-12 | Inca Digital Printers Ltd | Inkjet printhead drive circuit |
-
1986
- 1986-11-20 JP JP61277947A patent/JPH0720703B2/en not_active Expired - Lifetime
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0379780A2 (en) * | 1988-10-28 | 1990-08-01 | Brother Kogyo Kabushiki Kaisha | Driver circuit for piezoelectric actuator in a dot matrix printer |
| US5147141A (en) * | 1988-10-28 | 1992-09-15 | Brother Kogyo Kabushiki Kaisha | Driver circuit for piezoelectric actuator, and dot-matrix head and printer using piezoelectric or other actuator having discharge control means |
| JPH02210884A (en) * | 1989-02-10 | 1990-08-22 | Juki Corp | Piezoelectric element driving device |
| DE4122984A1 (en) * | 1990-07-11 | 1992-01-16 | Brother Ind Ltd | Control unit for piezoelectrical element - is connected to current supply unit and coil with switching unit selectively switched on and off to form resonant circuit |
| JPH0471858A (en) * | 1990-07-11 | 1992-03-06 | Brother Ind Ltd | Driving device of piezoelectric element |
| US5350962A (en) * | 1990-07-11 | 1994-09-27 | Brother Kogyo Kabushiki Kaisha | Driving device for piezoelectric element |
| DE4122984C2 (en) * | 1990-07-11 | 2003-12-24 | Brother Ind Ltd | Control device for a piezoelectric device and method for operating a control device for a piezoelectric device |
| WO2011024459A1 (en) * | 2009-08-27 | 2011-03-03 | 京セラ株式会社 | Input device and method for controlling input device |
| WO2011024460A1 (en) * | 2009-08-27 | 2011-03-03 | 京セラ株式会社 | Input device |
| JP2011048696A (en) * | 2009-08-27 | 2011-03-10 | Kyocera Corp | Input device |
| JP2011048692A (en) * | 2009-08-27 | 2011-03-10 | Kyocera Corp | Input device |
| CN102483663A (en) * | 2009-08-27 | 2012-05-30 | 京瓷株式会社 | Input device |
| CN102549530A (en) * | 2009-08-27 | 2012-07-04 | 京瓷株式会社 | Input device and method for controlling input device |
| US8823662B2 (en) | 2009-08-27 | 2014-09-02 | Kyocera Corporation | Input apparatus |
| US9436312B2 (en) | 2009-08-27 | 2016-09-06 | Kyocera Corporation | Input apparatus and control method for input apparatus |
| JP2011048854A (en) * | 2010-11-04 | 2011-03-10 | Kyocera Corp | Input device |
| JP2011048855A (en) * | 2010-11-04 | 2011-03-10 | Kyocera Corp | Input apparatus and control method of input apparatus |
| GB2596869A (en) * | 2020-07-10 | 2022-01-12 | Inca Digital Printers Ltd | Inkjet printhead drive circuit |
| US11731418B2 (en) | 2020-07-10 | 2023-08-22 | Agfa Nv | Inkjet printhead drive circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0720703B2 (en) | 1995-03-08 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |